Though Truth is a common principle according to our sastras, they still make a distinction taking into consideration the exigencies of a situation. If the utterance of truth can harm an innocent person, then our scriptures are clear that, under such circumstances, it is more imperative to help that person than utter the truth. For example, if ten rowdies chase a girl and they enquire us about her whereabouts then our scriptures declare that we should answer in the negative. The followers of those religions which declare that everyone should speak the truth under all circumstances may be forced to betray the girl under such circumstances. Otherwise, they may be guilty of the sin of failing the dictates of their religion. – Jagadguru Sri Chandrasekharendra Saraswathi Swamigal